Patent US3156837A successfully refreshed from Google Patents.
US3156837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic reciprocative saw
Assignee: WELLER TOOL CORP
•
Filing: 1963-04-03
•
Granted: 1964-11-10
•
Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 Carl E Weller
- 👤 Donald R Fegley
- 👤 Alden J Brassaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:33
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/02; H02K33/04; B; B23; B23D; B23D49/00; B23D49/10; B23D49/16; B23D49/162; B23D51/00; B23D51/16; B23D51/163; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T83/00; Y10T83/687; Y10T83/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A PORTABLE ELECTROMAGNETIC POWER SAW OF THE RECIPROCATIVE BLADE TYPE COMPRISING A CASING, AN ALTERNATING CURRENT ELECTROMAGNET IN SAID CASING INCLUDING A CORE EXTENDING ALONG A SELECTED AXIS HAVING A PAIR OF POLE FACES ADJACENT ONE END OF THE ELECTROMAGNET AND AN ELECTROMAGNET COIL ADAPTED TO BE ENERGIZED BY ALTERNATING CURRENT ELECTRICAL ENERGY, A MOVEABLE ARMATURE ADJACENT SAID ONE END FOR MOVEMENT TOWARD AND AWAY FROM SAID POLE FACES UPON OPERATION OF THE ELECTROMAGNET, A RECIPROCATIVE ROD MEMBER FOR REMOVABLY HOLDING A SAW BLADE EXTENDING GENERALLY PERPENDICULARLY TO SAID AXIS AND LOCATED BEYOND THE OPPOSITE END OF SAID ELECTROMAGNET RELATIVE TO SAID ARMATURE, LEVER MEANS PIVOTALLY SUPPORTED AT A FIXED LOCATION IN SAID CASING AT A POINT SPACED ABOVE SAID CORE HAVING A FIRST LEVER ARM EXTENDING BELOW SAID POINT SUPPORTING SAID ARMATURE FOR SWINGING MOVEMENT TOWARD AND AWAY FROM SAID POLE FACES AND A SECOND LEVER ARM EXTENDING FROM SAID POINT ABOVE SAID CORE AND TERMINATING IN A PIVOTAL CONNECTION WITH SAID ROD MEMBER FOR RECIPROCATING SAID ROD MEMBER RESPONSIVE TO VARIATIONS IN THE MAGNETIC FLUX IN SAID CORE, AND SPRING MEANS FOR RESILIENTLY URGING SAID ARMATURE AWAY FROM SAID POLE FACES.
Claim 2
Dependent Claim
193 words
A PORTABLE ELECTROMAGNETIC POWER SAW OF THE RECIPROCATIVE BLADE TYPE COMPRISING A CASING, AN ALTERNATING CURRENT ELECTROMAGNET IN SAID CASING INCLUDING A CORE EXTENDING ALONG A SELECTED AXIS HAVING A PAIR OF POLE FACES ADJACENT ONE END OF THE ELECTROMAGNET AND AN ELECTROMAGNET COIL ADAPTED TO BE ENERGIZED BY ALTERNATING CURRENT ELECTRICAL ENERGY, A MOVEABLE ARMATURE ADJACENT SAID ONE END FOR MOVEMENT TOWARD AND AWAY FROM SAID POLE FACES UPON OPERATION OF THE ELECTROMAGNET, A RECIPROCATIVE ROD MEMBER FOR REMOVABLY HOLDING A SAW BLADE EXTENDING GENERALLY PERPENDICULARLY TO SAID AXIS AND LOCATED BEYOND THE OPPOSITE END OF SAID ELECTROMAGNET RELATIVE TO SAID ARMATURE, LEVER MEANS PIVOTALLY SUPPORTED AT A FIXED LOCATION IN SAID CASING AT A POINT SPACED ABOVE SAID CORE HAVING A FIRST LEVER ARM EXTENDING BELOW SAID POINT SUPPORTING SAID ARMATURE FOR SWINGING MOVEMENT TOWARD AND AWAY FROM SAID POLE FACES AND A SECOND LEVER ARM EXTENDING FROM SAID POINT ABOVE SAID CORE AND TERMINATING IN A PIVOTAL CONNECTION WITH SAID ROD MEMBER FOR RECIPROCATING SAID ROD MEMBER RESPONSIVE TO VARIATIONS IN THE MAGNETIC FLUX IN SAID CORE, AND SPRING MEANS FOR RESILIENTLY URGING SAID ARMATURE AWAY FROM SAID POLE FACES.
References Cited (Backward Citations)
US2790276A
Cited
US2946358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |